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A Cosmic Double Helix in the Archetypical Quasar 3C273
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Journal Article
A Cosmic Double Helix in the Archetypical Quasar 3C273
2001
Overview
Finding direct evidence for plasma instability in extragalactic jets is crucial for understanding the nature of relativistic outflows from active galactic nuclei. Our radio interferometric observations of the quasar 3C273 made with the orbiting radio telescope, HALCA, and an array of ground telescopes have yielded an image in which the emission across the jet is resolved, revealing two threadlike patterns that form a double helix inside the jet. This double helical structure is consistent with a Kelvin-Helmholtz instability, and at least five different instability modes can be identified and modeled by a light jet with a Lorentz factor of 2 and Mach number of 3.5. The model reproduces in detail the internal structure of the jet on scales of up to 30 milli-arc seconds (∼300 parsecs) and is consistent with the general morphology of the jet on scales of up to 1 kiloparsec.
Publisher
American Society for the Advancement of Science,American Association for the Advancement of Science,The American Association for the Advancement of Science
Subject
/ Characteristics and properties of external galaxies and extragalactic objects
/ Exact sciences and technology
/ Jets and bursts. Galactic winds and fountains
/ Numbers
/ Plasma
/ Profiles
/ Quasars
/ Quasars. Active or peculiar galaxies, objects, and systems
/ Radio
/ Stellar systems. Galactic and extragalactic objects and systems. The universe
/ Studies
